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After the 70s, energy efficiency has become a more discussed topic in Brazil and in the world, what orig inated several actions related to energy conservation and efficiency. Despite these advances, data highlights that the energy’ saving potential of buildings does not guarantee its effective economy, as a consequence of projects’ failure and of how buildings are used. This research, part of a master dissertation, aims to evaluate users’ behavior on the activation of lighting, ventilation and control of solar incidence systems. UFMG Architecture School classrooms and laboratories were used as case study. The aim of this research was analyze, by the Post-Occupancy Evaluation method, the use of these systems and how these buildings and systems influence the behavior of users. We conducted a diagnosis of rooms for verification of natural lighting, using the Daysim and evaluation isolation hours and existing shading systems, artificial lift system and for analysis of user behavior, on-site observations, evaluating barriers and potentials of these systems were made. The observations were also used to verify the differences between large groups of individuals, in classrooms, and small groups, in laboratories. It was observed that there is a hierarchy in the systems use at classrooms, where teachers are the main authors of changes. In general, systems do not achieve users’ expectations, who, at various times, have difficulties regarding to their use. The users tend to act in the systems when they are disturbed, so the most efficient environments are those who least require users to act on them. Thus, the main contribution of this work was to identify that the buildings’ performance is consequence of their project and of the users’ understanding.

Uso de sistemas de iluminação e ventilação: estudo de caso da Escola de Arquitetura da UFMG